CN108535939A - heating device for camera lens - Google Patents
heating device for camera lens Download PDFInfo
- Publication number
- CN108535939A CN108535939A CN201810184206.2A CN201810184206A CN108535939A CN 108535939 A CN108535939 A CN 108535939A CN 201810184206 A CN201810184206 A CN 201810184206A CN 108535939 A CN108535939 A CN 108535939A
- Authority
- CN
- China
- Prior art keywords
- heating device
- ontology
- conductive material
- video camera
- camera lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 108
- 239000004020 conductor Substances 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 6
- 230000003993 interaction Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000002041 carbon nanotube Substances 0.000 claims description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 4
- 239000002322 conducting polymer Substances 0.000 claims description 4
- 229920001940 conductive polymer Polymers 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 239000006071 cream Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- -1 conductive oxide Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 239000002116 nanohorn Substances 0.000 claims description 2
- 239000002064 nanoplatelet Substances 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000000976 ink Substances 0.000 claims 1
- 239000002923 metal particle Substances 0.000 claims 1
- 238000013461 design Methods 0.000 description 9
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/55—Details of cameras or camera bodies; Accessories therefor with provision for heating or cooling, e.g. in aircraft
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/51—Housings
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/52—Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
Abstract
The present invention relates to one kind being used for video camera (5,5 ') camera lens (6,6 ', 6 ") heating device (1; 1 '; 1 "), wherein the heating device (1,1 '; 1 ") include at least one ontology (2,2 '), which includes at least one basis material and at least one conductive material, and the wherein conductive material is dispersed in the basis material to form conducting block；And at least two electric contacts (3a, 3b, 3a ', 3b '), the conducting block is contacted, to apply voltage to the conducting block.The invention further relates to including this heating device (1,1 '; 1 ") and video camera (5,5 ') system, for including this heating device (1,1 ', 1 ") and/or the backsight display device of the vehicle of such system, and be related to include this backsight display device vehicle.
Description
Technical field
The present invention relates to a kind of heating devices for camera lens.The heating device includes at least one ontology, should
Ontology includes at least one basis material and at least one conductive material, the wherein conductive material be dispersed in the basis material with
Form conducting block；And at least two electric contacts, the conducting block is contacted, to apply voltage to the conducting block.The heating device
It can be attached directly on the final glass element of the camera lens；Or it may be adapted to be arranged detachably in the video camera
At shell.The invention further relates to the system for including this heating device and video camera, additionally relate to for including this heating dress
Set and/or the backsight display device of the vehicle of this system, and be related to include this rearview indicator vehicle arrangement.
Background technology
In modern vehicle, the system based on video camera just becomes to become more and more popular.These vehicles are usually only with vision
System, or in addition to using vision system other than traditional mirror, is also used, wherein the left side, right side, front of the vehicle and after
The camera review in portion is presented to driver.Corresponding video camera is usually located at outside the protectiveness for being disposed in the outside vehicle
In shell；And/or in the shell (such as shell of rearview mirror) of the component of external installation.Therefore, which is exposed to various
Under different weather conditions.When external temperature is relatively low or humidity changes, moisture condensation may be formed on the camera lens, this is right
The normal function of the video camera produces adverse effect.In extreme circumstances, it is possible to that one layer can be gathered on the camera lens
Hoar crystal may finally damage the camera lens if do not removed in time.
Therefore, the video camera and/or camera lens are usually by heating element heats appropriate to avoid due to unfavorable
Weather condition and the failure that occurs.The heating device usually may be used as the internal element in the video camera or can be used in
On the shell of the video camera.The use of known inside and outside heating device has its disadvantage.For example, DE 103 40 900
A1 describes a kind of camera chain, has the heating element being integrated in the cloche of the camera lens.In document US
A kind of video camera is described in 2015/0160536 A1, and there is the heating element being installed in the camera housing.At this
In a little systems, which is inflexible, cannot be easily adaptable to design requirement or heat result institute with reaching best
The heating attribute needed.Moreover, because the design and material that are used in these systems, realize non-uniform heating.
Different methods is described in 100 33 472 A1 of DE, wherein multiple heating elements are arranged in resilient support
In element, which can be clamped in the ambient envelope of video camera.However, this specific solution has
Following disadvantage：When the video camera (such as when vibration that the vehicle including the video camera is likely to occur when driving) vibrated,
Elastic supporting member for supporting optical member may fall off.Moreover, many heating elements interconnected by wiring use so that heating system is considerably complicated
And it is easy error.Another disadvantage is that the arrangement of each heating element causes to add camera housing in the elastic supporting member for supporting optical member
Heat is uneven.A part of heat moreover, the elastic supporting member for supporting optical member has dissipated, which in turn reduces the efficiency factors of the system.Heat dissipation
The elastic material used in the elastic supporting member for supporting optical member is caused to be worn early.
Therefore, the present invention is intended to provide it is a kind of using can heating material improved heating device, may be used as inside
Heating device or external heating device and the firm and adaptable heating device for overcoming disadvantages mentioned above can be provided.Specifically
For, the present invention is intended to provide a solution, need less component, and its can generally from different camera shootings
Machine is used together, while providing high-caliber efficiency.
Summary of the invention
The present invention provides a kind of heating device of the camera lens for video camera, and the wherein heating device includes at least one
Body, the ontology include at least one basis material and at least one conductive material, and the wherein conductive material is dispersed in the matrix material
To form conducting block in material；And at least two electric contacts, the conducting block is contacted, to apply voltage to the conducting block.
Heating device according to the present invention may be used as internal heat, which may be adapted to direct
It is added in the camera lens of the video camera.In another embodiment, which may be used as external heating device,
In the device be suitable for be arranged detachably at the shell of the video camera.
At least one conductive material can any be capable of providing necessary electron motion to allow current to enough flowings
Material.In one embodiment, which includes carbon fiber, graphite, carbon nanotube, carbon nanohorn, carbon black, graphite
Or mixtures thereof alkene, graphene nanoplatelets, metallic particles, conductive oxide, conducting polymer.Those skilled in the art will know
Other conductive materials of heating purpose of the road suitable for the context of the invention.The conductive material can use in a variety of manners,
Such as, but not limited to fiber, pipe, sphere, thin slice, whisker etc..The conductive material or its not similar shape of a kind of particular form can be used
The mixture of formula.The conductive material can be used by any size suitable for the object of the invention.The conductive material is substantially uniform
Ground is dispersed in the basis material, so as to realize uniform heating effect.Preferably, the basis material and the conductive material
Form the conducting block of basic homogeneous.The conductive material of uneven distribution may also be provided in the basis material, to basis
The design and use of the heating element can obtain best heating effect.For example, in one embodiment, and it is distributed in
The conductive material in remaining ontology is compared, wherein there are two the areas adjacents of electric contact, and more conductions can be distributed with for arrangement
Material.
Term " conducting block " is used to refer to the substance with interior resistance, and when applying voltage on the two electric contacts, this is interior
Resistance is sufficiently high for the ontology for heating.
At least one basis material according to the present invention is such a any material：It keeps at elevated temperatures steady
Determine and the conductive material is allowed to may be uniformly distributed in wherein or allow to be distributed the conductive material as needed.The matrix material
Material can be organic or inorganic.In one embodiment, which can be polymer material.Exemplary inorganic material
Material is ceramic material, metal or metal material or glass.In one embodiment, which is polymer material.This
Field technology personnel will be appreciated that suitable basis material.
The basis material and conductive material that the ontology can have different construction and composition different, to create the heating
Element.In one embodiment, the ontology can be at least one clear coat, opaque coating, self-supported membrane, coating,
The form of ink, composite material in bulk etc..Therefore, according to the present invention, which can be that liquid, flexible material or hard are solid
The form of ontology.When as internal heat suitable for being applied directly on the camera lens, these forms may especially have
With.When as external heating device, which is preferably the form of hard and/or solid body, such as by composite wood in bulk
Material is made such as to form the shell of the heating element.
Clear coat can be applied directly on the camera lens or the additional different camera lenses that will be placed on the video camera
Between glass substrate on.For the particular design requirement of the camera lens, opaque coating can be applied to the impermeable of the camera lens
The part of light.Opaque coating can also be applied on additional substrate, cut into the form of the further nontransmitting part of the camera lens
And it is placed directly on the camera lens.The self-supported membrane can also so be done, wherein in one embodiment, which will be by
It cuts into required shape and is located in the top of the camera lens.In the case of solid body i.e. more hard ontology, which can
By have shape identical with the camera lens and in the form of, to realize the perfect cooperation between both parts.
The ontology can be prepared by conventional method well known by persons skilled in the art, such as mixture is mixed, is polymerize,
Squeeze out and/or be molded as final ontology.Can add other components, such as solvent etc., with obtain have it is required form and/
Or the ontology of form.
The heating element of the present invention, which is used as internal heating element, as described herein allows firm and compact design.This
Outside, since the design of the heating element can be adapted precisely to the design of the camera lens or the inside of the video camera, so heat can
To reach glass in an efficient way.Therefore, to obtain best heating as a result, it is desirable to energy it is less, therefore be applied to this
Pressure on the other component of camera lens and/or the video camera is smaller.
In the case where the shell of the camera lens is made of polymer material, it is possible to which conductive material is integrated into polymer
It is used as the heating element in body and by entire shell.
In the case where the heating device is used as external heating device, term " at shell " can be used to refer to the heating
The installation site of device so that the heating device can effectively heat the camera lens.Therefore, term " ... place " should also use
In referring on the camera housing or surrounding installation site.Term " removably " can be used to refer to two or more objects
The connection type of product can be disengaged in the case where not destroying one or two of the article.
In one embodiment, which includes rough annular opening, which is used for the ontology removably
It is arranged in the ambient envelope of the video camera, it is preferable that the shape of the ontology is as fastening nut.
In another embodiment, which includes the shell for the ontology to be connected to the video camera
Electrical connector.
In another embodiment, which includes the screw thread in the annular opening, is suitable for and the camera shooting
Respective threaded interaction on the shell of machine；And/or at least one protrusion or groove, be suitable for the video camera this is outer
Corresponding recesses on shell or protrusion interaction.
In one embodiment, the screw thread in the annular opening includes being touched for realizing the two electricity at least partly
The non-conducting material of point；Or the wherein annular opening includes two protrusions or groove for realizing the two electric contacts.
In the another embodiment of the system, which is suitable for keeping the camera lens of the video camera.Here, art
Language " being suitable for keeping the camera lens " can be used for limiting the lens bracket that the heating device can have the function of the video camera.In order to
The camera lens is kept, which can substantially have the shape of conventional lens bracket.
In the another embodiment of any of the above described system, which is injected on the ontology, rotation
Be screwed on the ontology and/or be injected into the ontology, it is preferable that at least two electric contact on the ontology substantially each other
It is relatively arranged.
Here, which is introduced into the intrinsic process by term " injection " for referring to by means of mechanical force.For example,
Compressed air " injection " electric contact can be passed through.This is intrinsic, which can in the case that the electric contact to be injected into
To include at least one barb, which is fixed in the conducting block.
In another embodiment, which includes at least one electric insulation layer, is disposed in the ontology
On surface, preferably wherein on the surface of the ontology of the body contacts camera lens or the shell, preferably the heating device into
One step includes Heat Conduction Material, preferably heat-conducting cream, and wherein the Heat Conduction Material is disposed between the insulating layer and the camera lens or should
Between insulating layer and the shell.
In yet another embodiment, which includes the bicomponent material for including conductive layer and heat-conducting layer, the conductive layer
Including the basis material and the conductive material, preferably wherein the heat-conducting layer and the camera lens or the video camera the shell extremely
Lack a part and/or is contacted at least part of the lens bracket of the camera lens is kept.
One aspect of the present invention is related to a kind of internal heat of the camera lens for video camera, the wherein heating device
Ontology including at least one transparent coating or paint pattern, the ontology include at least one conductive material；And at least two
A electric contact, and the conductive material contacts, to apply voltage to the conductive material.The conductive material can be electric conductive oxidation
Object, conducting polymer, carbon nanotube etc..The every other aspect of this embodiment is as described herein.
The invention further relates to a kind of systems of the video camera including heating device according to the present invention and with camera lens.
In one embodiment, which includes at least one power supply, preferably DC voltage source, is suitable for the two
Electric contact supplies voltage, it is preferable that the power supply is controllable by the signal of pulsewidth modulation (PWM).
The invention further relates to for vehicle, it is preferred for the backsight display device of motor vehicles comprising according to this hair
Bright at least one heating device and/or at least one system according to the present invention.
Moreover, the present invention relates to a kind of vehicles including at least one rear-view mirror device according to the present invention.
Have advantageously discovered that, the heating device according to the present invention can generally with many different types of video cameras
It is used together.In the case of internal heat, the heating device can have be wholly adapted to the camera lens form or should
The form that the interior design of video camera requires.In the case of external heating device, which is revolved
Being screwed on the external screw thread of camera housing allows to make the heating device quickly and securely to be connect with the camera housing.It is true
On, it is any that there are externally threaded video camera or other suitable attachment devices can modularly be equipped with is according to the present invention
Heating device.
Since the ontology of the heating device includes composite material, wherein conductive material is dispersed in inside basis material, institute
Can more uniformly heat the camera lens, turn, this reduces worn caused by thermal stress.By changing the mirror
Position of the heating device relative to the camera lens on head or on the camera housing, can easily find heating should
The optimum position of camera lens.
By manufacturing the ontology of the heating device by bi-component basis material, the conductive material for being responsible for heating can be with
With, such as camera housing electrical isolation, to be effectively prevented from failure or short circuit.
Moreover, the screw thread in the opening of the ontology is separated to realize by being at least partly introduced into non-conducting material
The two electric contacts, this allows for the heating device to be directly connected to the power line inside the camera housing.
If the heating device is used as the lens bracket of the video camera, which can directly connect with the camera lens
It touches, which enhance the heat to the camera lens to transmit.Moreover, this makes the use of conventional lens bracket become extra.Therefore, the heating
Device can be used for dual purpose, that is, heat the camera lens, while also keep the camera lens.
Description of the drawings
It is illustrated below to show each aspect of the present invention to improve the reason to the present invention in conjunction with some exemplary illustrations
Solution, wherein
Fig. 1 a, 1b show schematic elevational view and the signal of the heating device side according to first embodiment of the invention
Property sectional view；
Fig. 1 c, 1d show the schematic of the heating device according to first embodiment of the invention on video camera
Sectional view and isometric view；
Fig. 2 a, 2b show schematic elevational view and the signal of the heating device side according to second embodiment of the invention
Property sectional view；And
Fig. 2 c, 2d show the signal of the heating device second embodiment of the invention on video camera
Property sectional view and isometric view.
Fig. 3 is shown including some fish-eye portions according to the heating device of the present invention of third embodiment of the invention
Part.
Detailed description of the invention
Fig. 1 a and 1b show the side of the heating device 1 according to first embodiment of the invention schematic elevational view and
Schematic sectional view.As seen in figure la and lb, which consists essentially of the ontology 2 comprising conductive material.Shown in
In embodiment, which has the shape of fastening nut and includes annular opening 4.As seen in figure la and lb, roughly circular
Ontology 2 two opposed ends on two parts can it is planarized on the outer diameter of the ontology use spanner.However,
Those skilled in the art will know that the ontology 2 can also include variously-shaped on their outer circumference, such as the ontology 2 can wrap
Include the shape of substantially circular, rectangle and/or triangle.For example, the ontology 2 can be as the plastic section comprising conductive material
Part is injection moulded into single-piece.It will be appreciated by those skilled in the art that this can be by before plastic shaping, into plastic hybrid
Any of above conductive particle is added, is realized such as graphite or nano particle.
The ontology 2 can have sufficiently high interior resistance, be contacted with the conducting block of the ontology 2 when voltage is applied in
When on two electric contacts 3a, 3b, the interior resistance is sufficiently high for the ontology 2 for heating.Those skilled in the art will know that
Value within the scope of 50 to the 500 Ω common 12V voltages suitable for motor vehicles.Moreover, it will be appreciated by those skilled in the art that,
The two electric contacts 3a, 3b can be applied a voltage to by voltage source (not shown), which passes through pulse width
Modulation is to control generated heat so that the camera lens will not be adversely affected because of overheat.For example, PWM believes
Number can have 1：The duty ratio of x, electric input power can be reduced ' x ' factor by this.
It is substantially positioned relatively to each other that the two electric contacts 3a, 3b, which are shown in the accompanying drawings,.Shown in Fig. 1 a and 1b
In embodiment, which will have two resistor paths, and the resistor path is parallel to each other to be positioned and substantially have this
The half of the all-in resistance of body 2.Therefore, which will be P=2V2* R, wherein V are the voltage applied, and R is the ontology
2 all-in resistance.
In order to reduce/avoid the hot spot at the two electric contacts 3a, 3b, the electric contact 3a, 3b can be located at the ontology 2
Interior depths；And/or more conductive materials can be distributed in around the electric contact 3a, 3b and be located at the electric contact 3a, 3b to increase
The conductivity of the conductive material of surrounding.
Fig. 1 c and 1d show the heating device 1 according to the first embodiment of the invention on video camera 5
Schematic cross-sectional view and isometric view.In the example shown, the cap of lens bracket 7 is substantially by plastics dielectric material material
Material is made, and to include the ontology 2 of the conductive material can transfer heat to this via the cap of the lens bracket 7 and take the photograph
The camera lens 6 of camera 5.But technical staff will appreciate that, include conductive material, such as (as an example) gold for the lens bracket 7
The case where category, electric insulation layer (not shown) can be disposed on the surface of the ontology 2, and wherein the ontology 2 contacts the shell.Example
Such as, this can be by arranging that consisting essentially of the thin foil of isolated material completes between the two parts.It is alternatively possible at this
Heat-conducting cream is extraly arranged between isolated material and the camera housing to improve the heat transmission to the camera lens 6.Alternatively, should
Ontology 2 can also include two-component plastic material, which includes the conductive layer containing plastics and conductive material,
And the heat-conducting layer contacted at least part of the shell of the video camera 5.
In the embodiment shown in Fig. 1 c and Fig. 1 d, the annular opening 4 include be suitable for it is outer along this of the video camera 5
The screw thread of the respective threaded interaction of the circumference of shell.However, technical staff will be appreciated that, alternatively, the annular opening 4 is also
Can at least one protrusion or groove, be suitable for on the shell of the video camera 5 corresponding recesses or protrusion interact, with
The heating device 1 is connected to the video camera 5.Moreover, in further embodiment, which can be used for
The camera lens 6 of the video camera 5 is kept, this will make the lens bracket 7 of the video camera 5 shown in Fig. 1 c and Fig. 1 d become superfluous
It is remaining.
Fig. 2 a and 2b show the schematic front of the side of the heating device 1 ' according to second embodiment of the invention
Figure and schematic sectional view.The feature of the heating device 1 ' can correspond essentially to the heating device 1 shown in Fig. 1 a-1d
Feature, however the heating device 1 ' of second embodiment difference lies in electric contact 3a ', 3b ' be arranged to it is substantially flat
Row extends in the shell of video camera 5 '.Advantageously, embodiment shown in Fig. 2 a-2d allows greater compactness of design, is such as scheming
Can be best viewed in 2c and Fig. 2 d, wherein the heating device 1 ' is installed on the video camera 5 '.
Fig. 3 shows 180 ° in the exemplary use according to the heating device 1 " of the present invention of third embodiment of the invention
The simplification exploded view of some fish-eye components.The feature of the heating device 1 " can correspond essentially to institute in Fig. 1 a-1d
The feature of the heating device 1 shown.In the embodiment shown in simplifying, which can be applied directly to the camera lens 6 "
Glass elements behind, i.e., the heating device is attached directly on the camera lens of the video camera.The heating device 1 " have with
The form of the cooperation that is perfect in form of the camera lens, the function in order to provide enough heats without influencing the camera lens 6 ".In this reality
It applies in mode, which can be clear coat, opaque coating, self-supported membrane, coating, the form of ink or this paper institutes
Any other form stated.Additional component is that contact (is not shown；Can be the form of the above embodiment) so that electric power can
Reach element.Since electric power is also sent to video camera, this supply can also start the heating equipment.The embodiment its
His feature can be as disclosed by first embodiment.
The feature disclosed in claims, the description and the appended drawings is right individually and in the form of arbitrarily combining each other
For the different embodiments of the claimed invention, it may be possible to essential.
Reference numeral
1,1 ', 1 " heating device
2,2 ', 2 " ontology
3a, 3b, 3a ', 3b ' electric contacts
4,4 ' annular opening
5,5 ' video camera
6,6 ', 6 " camera lens
7,7 ', 7 " lens bracket
Claims (18)
1. heating device (1,1 ', 1 ") of the one kind for the camera lens (6,6 ', 6 ") of video camera (5,5 '), the wherein heating device
(1,1 ', 1 ") includes：
At least one ontology (2,2 ', 2 "), the ontology include at least one basis material and at least one conductive material, wherein should
Conductive material is dispersed in the basis material to form conducting block；And
At least two electric contacts (3a, 3b, 3a ', 3b '), the conducting block is contacted, to apply voltage to the conducting block.
2. heating device (1,1 ', 1 ") as described in claim 1, wherein
The conductive material includes carbon fiber, graphite, carbon nanotube, carbon nanohorn, carbon black, graphene, graphene nanoplatelets, gold
Or mixtures thereof metal particles, conductive oxide, conducting polymer, and be dispersed in the basis material, preferably the matrix material
Material and the conductive material form the conducting block of substantially homogeneous.
3. heating device (1,1 ', 1 ") as described in claim 1, wherein
The ontology (2,2 ', 2 ") is at least one clear coat, opaque coating, self-supported membrane, coating, ink, in bulk compound
The form of material.
4. heating device (1,1 ', 1 ") as described in any one of the preceding claims, wherein
The heating device (1,1 ', 1 ") is suitable for being added directly on the final glass element of the camera lens (6,6 ', 6 ")；Or wherein
The heating device is suitable for being added to the further nontransmitting part of the camera lens (6,6 ', 6 ").
5. heating device (1,1 ') as claimed any one in claims 1 to 3, wherein
The heating device (1,1 ') is suitable for being arranged detachably at the shell of the video camera (5,5 ').
6. heating device (1,1 ') as claimed in claim 5, wherein
The ontology (2,2 ') includes rough annular opening (4,4 '), and the opening is for removably arranging the ontology (2,2 ')
In the ambient envelope of the video camera (5,5 '), it is preferable that the shape of the ontology (2,2 ') is as fastening nut.
7. heating device (1,1 ') as claimed in claim 6, the wherein annular opening (4,4 ') include for by the ontology (2,
2 ') it is connected to the electrical connector of the shell of the video camera (5,5 ').
8. heating device (1,1 ') as claimed in claim 7, the wherein electrical connector include
Screw thread in the annular opening (4,4 ') is suitable for and the respective threaded phase interaction on the shell of the video camera (5,5 ')
With；And/or
At least one protrusion or groove are suitable for and the corresponding recesses or protrusion phase interaction on the shell of the video camera (5,5 ')
With.
9. heating device (1,1 ') as claimed in claim 8, wherein
The screw thread in the annular opening (4,4 ') includes the non-conducting material for realizing the two electric contacts at least partly；
Or
The annular opening (4,4 ') includes two protrusions or groove for realizing the two electric contacts.
10. heating device (1,1 ', 1 ") as described in any one of the preceding claims, wherein
At least two electric contact (3a, 3b, 3a ', 3b ') is injected on the ontology (2,2 ', 2 "), be screwed to the ontology (2,
2 ') it on and/or is injected into the ontology (2,2 ', 2 "), it is preferable that at least two electric contact (3a, 3b, 3a ', 3b ')
It is substantially positioned relative to each other in the main body (2,2 ').
11. heating device (1,1 ', 1 ") as described in any one of the preceding claims, wherein
The conductive material is distributed generally uniformly in the ontology (2,2 ', 2 "), or be distributed in remaining ontology (2,2 ', 2 ")
In the conductive material compare, wherein there are two the areas adjacents of electric contact (3a, 3b, 3a ', 3b ') to be distributed with more for arrangement
Conductive material.
12. the heating device (1,1 ') as described in any one of claim 5 to 11 comprising
At least one electric insulation layer is disposed on the surface of the ontology (2,2 '), and preferably wherein the ontology (2,2 ') connects
On the surface for touching the ontology (2,2 ') of the shell, preferably the heating device further comprises Heat Conduction Material, preferably heat-conducting cream,
Wherein the Heat Conduction Material is disposed between the insulating layer and the shell.
13. a kind of internal heat (1 ") of camera lens (6 ") for video camera, the wherein heating device (1 ") include at least
The ontology (2 ") of one transparent coating or paint pattern, the ontology include at least one conductive material；And at least two electricity
Contact, and the conductive material contacts, to apply voltage to the conductive material.
14. heating device as claimed in claim 13, the wherein conductive material include conductive oxide, conducting polymer and/
Or carbon nanotube.
15. a kind of system comprising：
According to the heating device (1,1 ', 1 ") of any one of claim 1 to 14, and the camera shooting with camera lens (6,6 ', 6 ")
Machine (5,5 ').
16. system as claimed in claim 15 comprising：
At least one power supply, preferably DC voltage source are suitable for two electric contacts (3a, 3b, 3a ', 3b ') supply voltage,
Preferably, which is controllable by the signal of pulsewidth modulation (PWM).
17. a kind of for vehicle, be preferably used for the rear-view mirror device of motor vehicles comprising at least one claim 1 to
14 heating device (1,1 ') and/or the system of at least one claim 15 or 16.
18. a kind of vehicle comprising at least one rear-view mirror device according to claim 17.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP17159418.7 | 2017-03-06 | ||
| EP17159418.7A EP3373571A1 (en) | 2017-03-06 | 2017-03-06 | Heating device for a camera lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108535939A true CN108535939A (en) | 2018-09-14 |
| CN108535939B CN108535939B (en) | 2021-07-20 |
Family
ID=58448270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810184206.2A Active CN108535939B (en) | 2017-03-06 | 2018-03-06 | Heating device for camera lens |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US10656501B2 (en) |
| EP (2) | EP3985960B1 (en) |
| CN (1) | CN108535939B (en) |
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| US11693234B2 (en) | 2018-12-18 | 2023-07-04 | Aptiv Technologies Limited | Heating device |
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| DE102018214108A1 (en) * | 2018-08-21 | 2020-02-27 | Conti Temic Microelectronic Gmbh | Temperature regulating element and sensor arrangement |
| CN112198744B (en) * | 2019-07-31 | 2021-10-22 | 宁波舜宇车载光学技术有限公司 | Optical device and application thereof |
| CN113905472B (en) * | 2020-07-07 | 2024-04-12 | 宁波舜宇车载光学技术有限公司 | Lens with heating device and lens comprising lens |
| US20230011812A1 (en) * | 2021-07-06 | 2023-01-12 | Eterge Opto-Electronics Co., Ltd. | Optical imaging lens |
| EP4123357A1 (en) * | 2021-07-23 | 2023-01-25 | Ficosa Adas, S.L.U. | Lens assembly, camera module having a lens assembly for motor vehicles, and a method for making a lens assembly |
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Also Published As
| Publication number | Publication date |
|---|---|
| US10656501B2 (en) | 2020-05-19 |
| US20180252990A1 (en) | 2018-09-06 |
| CN108535939B (en) | 2021-07-20 |
| EP3373571A1 (en) | 2018-09-12 |
| EP3985960B1 (en) | 2022-11-23 |
| EP3985960A1 (en) | 2022-04-20 |
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